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Cheap ONT to DEN Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Ontario to Denver route information

Origin Airport Los Angeles - Ontario Intl.
Destination Airport Denver Intl.
Airlines Serving Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Flight Price $127
Distance 816 mi

San Bernardino


Orange County


Long Beach


Los Angeles




Cheap ONT to DEN Flights

  • Question : What is the cheapest airline flying from Ontario to Denver?
    Answer : Frontier Airlines is offering the best deal at $116. Better grab that deal quickly because prices range all the way up to $1,406 over the next three months.
  • Question : How many flights are there per day from Ontario to Denver?
    Answer : Of course, the day of the week matters, but on average, 10 different flight times exist when you fly from ONT to DEN. You’ll have more choices on this route than most others departing the United States.
  • Question : Which airline has the least delays from Ontario to Denver?
    Answer : Booking with United Airlines means you will arrive to Denver around the time you were supposed to. In fact, this timely airline has an 85% average for landing before the plane turns into a pumpkin. Of course, it never hurts to be prepared. If you’re on Frontier Airlines, be sure to sign up for the delay notifications to stay up to date with your flight’s status.
  • Question : How long is the flight from ONT to DEN?
    Answer : If you're able to take the direct flight (which is offered by Southwest Airlines), you will be able to leave ONT at 4:05 PM PDT and get to DEN at 7:10 PM MDT (two hours and five minutes). Remember, there is a one-hour time change.
  • Question : How much is a plane ticket to Denver (DEN) from Ontario (ONT)?
    Answer : They range from $116 to $1,406. Booking far in advance can usually help you get the cheapest rate. The further out you book, the more likely you are to save on your trip.
  • Question : Is there a day that has more departure times to choose from than other days?
    Answer : When you’re flying from ONT to DEN, the day with the most flight times is Sunday, with 12 different options. The day with the fewest number of options is Saturday with only eight different times.
  • Question : What is the cheapest day to fly to Denver?
    Answer : As of Jun 17th, the best day for deals to Denver (DEN) is Jul 17th. It cost $124, which is 55% below the average price to book the same route.